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--- daily_regular_expression [2009/10/17 17:47] – created k2patel
+++ daily_regular_expression [2020/08/10 02:35] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 <code bash>
 egrep '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'
+</code>
+<code bash>
+grep '^[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}$'
+</code>
+<code bash>
+cat textfile | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'
+</code>
+<code bash>
+/sbin/ifconfig | grep "inet addr" | awk -F : '{print $2}' | awk '{print $1}' | grep -v -e '^192.\|^127.\|^10.'
 </code>